/**
 * Copyright (c) 2012-2016, www.tinygroup.org (luo_guo@icloud.com).
 *
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.gnu.org/licenses/gpl.html
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.tinygroup.tinysqldsl.expression.relational;

import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;
import org.tinygroup.tinysqldsl.expression.Expression;

public class NotEqualsTo extends OldOracleJoinBinaryExpression {

    private final String operator;


    public NotEqualsTo(Expression leftExpression, Expression rightExpression) {
        this(leftExpression, rightExpression, false, "<>");
    }

    public NotEqualsTo(Expression leftExpression, Expression rightExpression,
                       boolean not, String operator) {
        super(leftExpression, rightExpression, not);
        this.operator = operator;
        if (!"!=".equals(operator) && !"<>".equals(operator)) {
            throw new IllegalArgumentException("only <> or != allowed");
        }
    }

    public String getStringExpression() {
        return operator;
    }

    public void builderExpression(StatementSqlBuilder builder) {
        builder.visitOldOracleJoinBinaryExpression(this, " " + getStringExpression() + " ");
    }
}
